Letter | Published:

Water Absorption by Submerged Leaves

Naturevolume 180page1368 (1957) | Download Citation



DIXON1,2 and van der Paauw3,4 have both recorded the uptake of water by the cut ends of submerged shoots of land plants ; but there is divergence in their findings concerning the factors which affect the rate of absorption. Dixon found that factors which favoured rapid photosynthesis caused an increased rate of absorption. Van der Paauw found that in illuminated shoots the rate of water uptake was reduced to zero or that water was even exuded from the cut end, but darkness favoured absorption. Other workers5 were unable to confirm Dixon's early results.

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  1. 1

    Dixon, H. H., Sci. Proc. Roy. Dublin Soc., 22, No. 5, 55 (1938).

  2. 2

    Dixon, H. H., and Barlee, J. S., Sci. Proc. Roy. Dublin Soc., 22, No. 20, 211 (1940).

  3. 3

    Paauw, van der F., Rec. Trav. Bot. Neerl., 32 292 (1935).

  4. 4

    Paauw, van der F., Nature, 166, 231 (1950).

  5. 5

    Smith, F., Dustman, R. B., and Shull, C. A., Bot. Gaz., 91, 395 (1931).

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  1. Dept. of Botany, Makerere College, Kampala, Uganda

    • T. R. MILBURN


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